old_flsystem/类库/SqlSugar/ExpressionsToSql/Subquery/Items/SubFromTable.cs

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C#
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2022-09-20 03:10:29 +00:00
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
namespace SqlSugar
{
public class SubFromTable : ISubOperation
{
public bool HasWhere
{
get; set;
}
public string Name
{
get
{
return "Subqueryable";
}
}
public Expression Expression
{
get; set;
}
public int Sort
{
get
{
return 300;
}
}
public ExpressionContext Context
{
get;set;
}
public string GetValue(Expression expression)
{
var exp = expression as MethodCallExpression;
var resType = exp.Method.ReturnType;
var entityType = resType.GetGenericArguments().First();
var name = entityType.Name;
if (this.Context.InitMappingInfo != null)
{
this.Context.InitMappingInfo(entityType);
this.Context.RefreshMapping();
}
var result= "FROM "+this.Context.GetTranslationTableName(name, true);
if (this.Context.SubQueryIndex > 0) {
result += " subTableIndex"+this.Context.SubQueryIndex;
}
return result;
}
}
}